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Proof step 58 from proof refine-read-echdr (previous step)

apebs[m2] = mkpeb(aehdr1, avhdr, buf0, m1, false), pebs[m2] = mkpeb(buf1, m3, false), m2 < # pebs, m2 < # apebs, abs(pebs, apebs), abs-peb(mkpeb(buf1, m3, false), mkpeb(aehdr1, avhdr, buf0, m1, false)), is-encoded(echdr(m0), subarray(buf1, 0, EB_PAGE_SIZE)), mtd-cons(pebs), ubi-io-inv(apebs), EB_PAGE_SIZE ≤ PEB_SIZE ⊦ ⟨choose err0 with ⌊err0⌋ ∨ err0 = ESUCCESS in err := err0; bitflips := ?; if err = ESUCCESS then aehdr := apebs[m2].echdr else aehdr := ?⟩ (aechdr(m0) = aehdr ∧ (bitflips0 ↔ bitflips) ∧ ESUCCESS = err), subarray(buf1, 0, EB_PAGE_SIZE) = emptypage

Heuristic symbolic execution applied rule choose right

And obtained the following new goals

Proof step 59:
pebs[m2] = mkpeb(buf1, m3, false), apebs[m2] = mkpeb(aehdr1, avhdr, buf0, m1, false), m2 < # apebs, m2 < # pebs, abs(pebs, apebs), abs-peb(mkpeb(buf1, m3, false), mkpeb(aehdr1, avhdr, buf0, m1, false)), is-encoded(echdr(m0), subarray(buf1, 0, EB_PAGE_SIZE)), mtd-cons(pebs), ubi-io-inv(apebs), EB_PAGE_SIZE ≤ PEB_SIZE ⊦ ∃ err0. (⌊err0⌋ ∨ err0 = ESUCCESS) ∧ ⟨err := err0; bitflips := ?; if err = ESUCCESS then aehdr := apebs[m2].echdr else aehdr := ?⟩ (aechdr(m0) = aehdr ∧ (bitflips0 ↔ bitflips) ∧ ESUCCESS = err), subarray(buf1, 0, EB_PAGE_SIZE) = emptypage

Proof step 58 from proof refine-read-echdr (previous step)

Heuristic symbolic execution applied rule choose right

And obtained the following new goals

Rule argument

Additional information